I will eventually begin charging for access to certain areas of the community, which will be restricted to certain account types (industry professionals.) I am not ready to begin charging just yet, but I have already setup the account types and would like to require approval for certain account types but not all.

I.e. I'd like people to be able to sign up for a Default account without any restrictions, but for those who would sign up as Pro1, Pro2 or Pro3 accounts, I would like to review and approve their membership based on information that they provide at sign up. 

Is there a way to set this up?